CN101134235A - Method and apparatus for manufacturing aluminum die-cast product - Google Patents
Method and apparatus for manufacturing aluminum die-cast product Download PDFInfo
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- CN101134235A CN101134235A CNA2007100047811A CN200710004781A CN101134235A CN 101134235 A CN101134235 A CN 101134235A CN A2007100047811 A CNA2007100047811 A CN A2007100047811A CN 200710004781 A CN200710004781 A CN 200710004781A CN 101134235 A CN101134235 A CN 101134235A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D27/00—Treating the metal in the mould while it is molten or ductile ; Pressure or vacuum casting
- B22D27/09—Treating the metal in the mould while it is molten or ductile ; Pressure or vacuum casting by using pressure
- B22D27/11—Treating the metal in the mould while it is molten or ductile ; Pressure or vacuum casting by using pressure making use of mechanical pressing devices
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Abstract
A method and an apparatus for manufacturing an aluminum die-cast product are provided, wherein an occurrence of shrinkage cavity is eliminated or reduced to a very small amount, and a sound and high-quality aluminum die-cast product having no casting defect can be produced. The method for manufacturing an aluminum die-cast product by performing die casting while a part, in which a casting defect tends to occur due to solidification shrinkage of a melt, which has been pressure-filled in a mold, during a solidification process, is pressurized with a local pressurization pin includes the steps of allowing the local pressurization pin to follow the movement of a solidification interface based on a solidification interface movement speed, which is calculated in advance, of the melt and keeping pushing the local pressurization pin in until the solidification is completed.
Description
Technical field
The present invention relates to be suitable for very much to require the manufacture method and the device of aluminum die-cast product of the manufacturing of bubble-tight pressure vessel etc.
Background technology
Usually, known in aluminum die-cast product, when die casting, be the center with the slowest part of the setting rate that is filled into the motlten metal in the metal pattern, produce the solidification shrinkage space of following solidification shrinkage.When being aluminium alloy, produce about 6% volume contraction when solidifying.Owing to wrap in foundry goods inside in this shrink space, therefore produce the shrinkage cavity of concentrating, it becomes casting flaw.The wall thickness that shrinkage cavity has casting station is thick more, metal pattern temperature high more (thermograde is little), more the tendency of long range diffusion.
Above-mentioned casting flaw is shrinkage cavity, when product is pressure vessel, becomes the reason of pressure leakage, becomes one of principal element that causes as the decrease in yield of product.
The technology that shrinkage cavity during as the reduction casting takes place, known have when the motlten metal of filling solidifies half curdled appearance before facing, the pressurized method (for example, open clear 59-156560 communique with reference to the spy and the spy opens flat 8-155622 communique) at the position of shrinkage cavity takes place in pressurized easily.
This spy opens the technology shown in the flat 8-155622 communique, be to utilize oil cylinder, be pressed into the pressurized pin before facing solidifying, detect the pressure of pressurized pin on one side, make oil cylinder move to the scope that the instrumentation squeeze pressure reaches the regulation of setting squeeze pressure on one side, by controlling the stroke value of local loaded pins, reduce or eliminate shrinkage cavity.
But, above-mentioned spy opens the technology of flat 8-155622 communique, but is one side detected pressures in the time of only setting with timer, Yi Bian be pressed into the pressurized pin, not talkatively can grasp the setting rate that is filled into the motlten metal in the metal pattern reliably or solidify sequential, control local loaded pins.
Follow solidification shrinkage and the solidification shrinkage space disappearance (Closed mouth of opening in order to make reliably), need with solidify sequential pressurized control pressurized pin as one man, but in pressurized method in the past, do not grasped the control of the pressurized pin of setting rate reliably, the probability of success that the solidification shrinkage space disappears is low, does not reach the elimination shrinkage cavity.
Draw from above, in die casting pressing pressure container, situation is the stage that also is not able to satisfy at the yield rate of the pressure leakage that causes because of shrinkage cavity.
Summary of the invention
The present invention proposes in view of the above fact, its purpose is to provide a kind of manufacture method and device of aluminum die-cast product, it can be by controlling the action that is pressed into of local loaded pins, eliminate the generation of shrinkage cavity, or it is reduced to denier, make the high-quality aluminum die-cast product that perfects of no casting flaw.
For addressing the above problem, the manufacture method of aluminum die-cast product of the present invention and device adopt following scheme.
Promptly, the manufacture method of aluminum die-cast product of the present invention, it is by utilizing the pressurized pin, pressurization is filled into motlten metal in the metal pattern is easy to generate casting flaw because of solidification shrinkage in process of setting position pressurization die casting, it is characterized in that, the moving of freezing interface that described pressurized pin is obtained based on the freezing interface translational speed by precalculated described motlten metal followed, and described pressurized pin continued to be pressed into solidifies the finish time.
Manufacture method according to aluminum die-cast product of the present invention, because making the pressurized pin follows based on the mobile of freezing interface that the freezing interface translational speed by precalculated described motlten metal (from the metal pattern surface to solidifying the degree of depth of portion (mm) at the latest/solidify the solidifying the concluding time of portion (s) at the latest) obtains, and it is continued to be pressed into solidify the finish time, so can as one man be pressed into the pressurized pin with the sequential of solidifying of motlten metal.Promptly, analyze the freezing interface translational speed of grasping the part that needs pressurized reliably in advance by utilizing, follow movably the pressurized pin being continued to be pressed into and solidifying the finish time of the freezing interface that obtains thus, solidification shrinkage space (becoming shrinkage cavity) is disappeared.Thereby, can eliminate the generation of the shrinkage cavity of following solidification shrinkage, or it is reduced to denier, can make the sound high-quality aluminum die-cast product of no casting flaw.In addition, thus, the yield rate in the time of can increasing substantially die casting is with the high-quality aluminum die-cast product of low-cost manufacturing.
The manufacture method of aluminum die-cast product of the present invention is counted the formation of the pressurization that began to utilize described pressurized pin after 0.4～1.4 second in the time of also can forming the end-of-fill from described motlten metal.
Constitute according to this, owing to count the pressurization that after 0.4～1.4 second, begins to utilize the pressurized pin during from the end-of-fill of motlten metal, so can make the pressurized pin follow continuing movably to be pressed into and solidifying the finish time of freezing interface.That is, if utilize the pressurization of pressurized pin to begin too early, because the resistance of pressing in that motlten metal forms before solidifying beginning is little, so press-in speed is excessive, the pressurized pin is pressed into the stroke end, and difficulty continues the pressurized pin to be pressed into solidifies the finish time.So, by end-of-fill from motlten metal, just begun to solidify back (from end-of-fill time count after 0.4 second), begin to utilize the pressurization of pressurized pin during about 1 second, the pressurized pin can be pressed into the stroke end, can reliably the pressurized pin be continued to be pressed into and solidify the finish time.Thus, can eliminate the generation of shrinkage cavity, or it is reduced to denier.In addition, if count through 1.4 seconds during from end-of-fill, the progress of solidifying that is pressed into the position of pressurized pin then, difficult the pressurized pin is continued to be pressed into solidifies the finish time.
In addition, the motlten metal of filling solidify beginning, do not rely on the size or the shape of die-cast product, roughly the same, so utilize the pressurization time started of pressurized pin, irrelevant with the kind of aluminum die-cast product, can be by described setting.
The manufacture method of aluminum die-cast product of the present invention also can form the formation that the average press-in speed V of described pressurized pin is set at 1.2mm/s＜V＜2.63mm/s.
According to this formation, because the average press-in speed V of pressurized pin is set at 1.2mm/s＜V＜2.63mm/s, so can make the pressurized pin follow the freezing interface continue reliably to be pressed into movably solidify the finish time, and can be pressed into the position of abundant crushing shrinkage cavity reliably.Herein, if the wall thickness at the position of pressurized is set in about 20mm, the concluding time of solidifying of portion is 3.8 seconds owing to solidify at the latest, so the freezing interface translational speed is 2.63mm/s, by being pressed into the pressurized pin as upper limit press-in speed, can reliably the pressurized pin be pressed into the position of abundant crushing shrinkage cavity with this.If press-in speed is below 1.2mm/s, resistance of pressing in is excessive, can not be pressed into the pressurized pin.In addition, because it is shallow more to have the compression distance of pressurized pin, the inadequate more tendency of the crushing method of shrinkage cavity is so control the press-in speed of local loaded pins, guarantee sufficient compression distance, this operates in and makes disappearance aspect, solidification shrinkage space (becoming shrinkage cavity) become important key element reliably.Promptly, since from the end-of-fill of motlten metal begin constantly to count solidify the fastest part of end (metal pattern contact portion) and solidify at the latest part between to have setting time poor, so even moment is pressed into the pressurized pin also to no effect during this time, so with being pressed into enough degree of depth several seconds, the reliable elimination or the minimizing that take place for shrinkage cavity are important key elements according to above-mentioned press-in speed.
The manufacture method of aluminum die-cast product of the present invention also can form the formation that described aluminum die-cast product is a pressure vessel.
According to this formation, because aluminum die-cast product is a pressure vessel, so can utilize the die casting manufacturing not have the pressure vessel of the casting flaw of the main cause that becomes pressure leakage (shrinkage cavity).Thereby the yield rate of the pressure leakage in the time of can increasing substantially at die casting can be made high-quality pressure vessel with low cost.
The manufacture method of aluminum die-cast product of the present invention also can form the formation that described pressure vessel is the housing of compressor.
Constitute according to this,,, can make and be enclosed the high housing of air-tightness that inner refrigerant gas does not leak so be reduced to denier by the generation of elimination shrinkage cavity or with it because pressure vessel is the housing of compressor.Especially, under the situation of compressor housing, many after casting the wall thickness lug boss of machining housing, even the outside is clean, be shrinkage cavity if there is casting flaw in inside, then it exposes in the cutting face, becomes the main cause that refrigerant gas leaks.According to above-mentioned formation, owing to can eliminate the generation of shrinkage cavity or it is reduced to denier, so the casting die of suitable compressor housing can be provided.
The manufacturing installation of aluminum die-cast product of the present invention, it is by utilizing the pressurized pin, pressurization is filled into motlten metal in the metal pattern is easy to generate casting flaw because of solidification shrinkage in process of setting position pressurization die casting, it is characterized in that, possess: the pressurized pin, it is provided with this position of pressurized corresponding to the position that is easy to generate described casting flaw; Pressing mechanism, it is used for being pressed into towards described position described pressurized pin; Control part, it controls described pressing mechanism, and the moving of freezing interface that described pressurized pin is obtained based on the freezing interface translational speed by precalculated described motlten metal followed, and described pressurized pin continued to be pressed into solidifies the finish time.
Manufacturing installation according to aluminum die-cast product of the present invention, owing to possess and be used to control the pressing mechanism that is pressed into the pressurized pin, described pressurized pin is followed based on the moving of freezing interface that the freezing interface translational speed by precalculated described motlten metal obtains, and it is continued to be pressed into the control part that solidifies end, so can as one man be pressed into the pressurized pin by the sequential of solidifying of this control part and motlten metal.Promptly, because can be by analyzing the reliable freezing interface translational speed of grasping the part that needs pressurized in advance, follow movably the pressurized pin being continued to be pressed into and solidifying the finish time of the freezing interface that obtains thus, become the solidification shrinkage of shrinkage cavity space and disappear so can make reliably.Therefore, can eliminate the generation of the shrinkage cavity of following solidification shrinkage reliably, or it is reduced to denier, can make the sound high-quality die casting of no casting flaw, yield rate in the time of simultaneously can increasing substantially die casting can be made high-quality die-cast product with low cost.
The manufacturing installation of aluminum die-cast product of the present invention, the position that also can form and be easy to generate described casting flaw is provided with overflow part accordingly on described metal pattern, can set up described pressurized pin in described overflow part with being pressed into, utilize the formation of the described overflow part of described pressurized pin pressurized.
According to this formation, because overflow part is set, on this overflow part, set up local loaded pins on metal pattern, this overflow part of pressurized is so can prevent the pressurization vestige that the product side generation pressurized in die casting causes.Therefore, can eliminate the restriction at the position of pressurized, can make and not have vestige, the higher-quality die-cast product of pressurization.
Manufacture method and device according to aluminum die-cast product of the present invention, owing to can follow moving of the freezing interface that is filled into the motlten metal in the metal pattern pressurized pin continued to be pressed into and solidify the finish time, become the solidification shrinkage of shrinkage cavity space and disappear so can make reliably.Thereby, can eliminate the generation of the shrinkage cavity of following solidification shrinkage reliably, or it is reduced to denier, can make the sound aluminum die-cast product of no casting flaw.In addition, the yield rate in the time of can increasing substantially die casting can be made high-quality aluminum die-cast product with low cost.
Description of drawings
Fig. 1 is the cutaway view with the aluminum die-cast product (compressor housing) of the manufacture method of the aluminum die-cast product of one embodiment of the present invention and device manufacturing.
Fig. 2 is the local concise and to the point pie graph of manufacturing installation of the aluminum die-cast product of one embodiment of the present invention.
Fig. 3 be one embodiment of the present invention aluminum die-cast product manufacture method the pressurized portion that passes through analyses and prediction solidify the key diagram that closed loop forms situation.
Fig. 4 is quality research result's the key diagram of pressurized preproduction of manufacture method that utilizes the aluminum die-cast product of one embodiment of the present invention.
The specific embodiment
Below, with reference to Fig. 1～Fig. 4 one embodiment of the present invention is described.
The routine aluminum die-cast product that the manufacture method of the aluminum die-cast product by present embodiment shown in Fig. 1 and device are made.Herein, as aluminum die-cast product, illustration is used for the housing 1 of compressor.
Described housing 1 is the cup-like shape of cylindrical portion 1A with thin-walled, and in the many places of its periphery, die casting integratedly has the lug boss 1B of the heavy wall thicker several times than cylindrical portion 1A.The wall thickness maximum of this lug boss 1B is set at 20mm.Lug boss 1B is the part that is used to machining screwed hole or through hole etc. after die casting, if follow the solidification shrinkage space (becoming shrinkage cavity) of solidification shrinkage in inside when die casting, it spills in the cutting face because of machining.Leak because this becomes refrigerant gas, so will obtain not having pressure leakage, housing 1 that no gas leaks, the shrinkage cavity during elimination die casting is inevitable.
Be used to shown in Fig. 2 make the part of die casting manufacturing installation 10 that casting flaw is the aluminium die casting system housing 1 of shrinkage cavity do not take place.
On metal 11, the overflow part 11B that is connected with cavity 11A is set.This overflow part 11B, the position that is easy to generate the casting flaw shrinkage cavity during with casting is provided with accordingly.That is, on above-mentioned housing 1, with the thick lug boss 1B (wall thickness 20mm) of wall ratio cylindrical portion 1A accordingly, be located at many places (in Fig. 2,1 place only being shown).And, set up local pressurizing device 13 at the outer side of metal pattern 11, it can pressurize independently respectively and be filled into motlten metal 12 among the described overflow part 11B.
This local pressurizing device 13 possesses and is installed in adding air cylinder 14, link with this piston 15 that adds air cylinder 14 and with the pressurized pin 16 of prescribed limit as stroke on the metal pattern 11.Pressurized pin 16 is provided with in the mode that can be pressed into overflow part 11B, and in the present embodiment, it is pressed into maximum stroke L, for example is set at 18mm, and the pin footpath for example is set at 9mm.
Add air cylinder 14, be used for pressurized pin 16 is pressed into overflow part 11B.Add in the air cylinder 14 at this, chamber 14A for Xiang Yifang, never illustrated oil pressure supply source is supplied with oil via direction transfer valve 17, magnetic valve 18 and choke valve 19, and is oily via 17 discharges of direction transfer valve from the opposing party's chamber 14B, connects well-known oil pressure path 20A, 20B.On oil pressure path 20B, be provided for monitoring the flowmeter 21 of the stroke of local loaded pins 16.
In addition, be located at direction transfer valve 17, magnetic valve 18, choke valve 19 and flowmeter 21 on described oil pressure path 20A, the 20B that adds air cylinder 14, can and monitor by control device 22 controls.
(1) by set opening and closing the timing of magnetic valve 18, that determines pressurized pin 16 starts time started ts.
(2) by changing the aperture of choke valve 19, regulate the flow of compressed oil, control the press-in speed V of local loaded pins 16.
For by utilizing above-mentioned local pressurizing device 13, pressurized is easy to generate the position that casting flaw is shrinkage cavity, the solidification shrinkage space is disappeared, eliminate the generation of shrinkage cavity, the generation of defects position need be positioned at can be by the crushed position of being pressed into of pressurized pin 16, and need with the motion that sequential is as one man suitably controlled local loaded pins 16 of solidifying of motlten metal 12.
The closed loop of solidifying of the pressurized portion by analyses and prediction shown in Fig. 3 forms situation.
Herein, judge as follows: under hypothesis pressurized pin holding state, solidify closed loop when forming situation, anticipation be located at hypothesis form pressurized pin 16 in the thick place of heavy wall (wall thickness 20mm) solidify closed loop under solidify closed loop, thereby just can carry out the disappearance of defective as long as suitably control local loaded pins 16.Infer in addition, begin to solidify the fastest part of end (and contact portion of metal pattern 11) constantly and solidify at the latest between the part from the end-of-fill of the motlten metal by analyses and prediction, setting time with 3.6 seconds is poor, even moment is pressed into pressurized pin 16 also to no effect during this period, need pressurized pin 16 be pressed into enough degree of depth with several seconds time.In addition, also as shown in Figure 3, under the situation of present embodiment, motlten metal 12 is counted after 0.2 second constantly from end-of-fill, begin to solidify, to the time of solidifying end be 3.8 seconds.
According to above analysis, can draw following conclusion, promptly by grasping the freezing interface translational speed of the part that needs pressurized in advance reliably, follow moving of the freezing interface that obtains thus and pressurized pin 16 continued to be pressed into solidify the finish time, solidification shrinkage space (becoming shrinkage cavity) is disappeared.In addition, the freezing interface translational speed of motlten metal 12 can be calculated by " from the metal pattern surface to solidifying the degree of depth of portion (mm) at the latest/solidify the solidifying the concluding time of portion (s) at the latest ".
Based on this conclusion, as parameter, trial-production pressurized product carries out its quality research with these two of the press-in speed V that starts time started ts, (2) pressurized pin 16 of above-mentioned (1) pressurized pin 16.
The quality research of the preproduction of pressurized shown in Fig. 4.With the shape of the tracing point of representing each experiment condition (zero, △ and) expression X ray evaluation result, apperance (blacking, some point and blank) expression proportion with tracing point, in addition, the average press-in speed V of the numeral pressurized pin 16 of remarks on tracing point.
This result (partly pressurizes at lug boss 1B when the die casting and inserts casting and pull pin hole under the casting forming with the method (cast pulls out I ピ Application worker method) of pulling pin of casting in the past.) compare, generally all approve improvement.But the compression distance of pressurized pin 16 is shallow more, and the crushing method of defective is insufficient more.In addition, the running time of pressurized pin 16 more early, and press-in speed V is fast more, just has pressurized pin 16 to be pressed into the tendency of stroke end more, but also finds slight defective therein sometimes.Therefore, for above-mentioned condition,, think and preferably avoid for when producing in batches, obtaining stabilized quality.
In addition, the pull pin proportion of method of casting in the past is approximately 2.67g/cm
3, but for preproduction, all at 2.71g/cm
3More than, approval improves.
Especially, in the scope of the heavy line in Fig. 4, confirm in the X ray evaluation, not find defective, and obtain proportion at 2.73g/cm
3Above high-quality.
That is count after 0.4～1.4 second when, the running time of pressurized pin 16 being set at end-of-fill from motlten metal 12.Promptly, preferably, count the pressurization that began to utilize pressurized pin 16 after 0.4～1.4 second during from the end-of-fill of motlten metal 12, the end-of-fill that pressurized pin 16 is continued to be pressed into motlten metal 12 is (herein, from end-of-fill time begin to count be 3.8 seconds) constantly.Begin too early if pressurize, then owing to before solidifying beginning, so the resistance of pressing in that motlten metal 12 forms is little, and press-in speed is excessive, and pressurized pin 16 is pressed into the stroke end, and difficulty continues pressurized pin 16 to be pressed into solidifies the finish time.On the other hand,, make progress, therefore have the compression distance of pressurized pin 16 to shoal, the inadequate misgivings of the crushing method of defective owing to solidify if it is slow to utilize the pressurization of pressurized pin 16 to begin.By end-of-fill from motlten metal 12, when just beginning to solidify (from end-of-fill time count after 0.4 second), begin to utilize the pressurization of pressurized pin 16 in greatly during 1 second, pressurized pin 16 can not be pressed into the stroke end, can reliably the pressurized pin be continued to be pressed into and solidify the finish time, and pressurized pin 16 can be pressed into enough degree of depth.
In addition, preferably the average press-in speed V of pressurized pin 16 is set at the scope of 1.2mm/s＜V＜2.63mm/s.Promptly, be set at 1.2mm/s＜V＜2.63mm/s by average press-in speed V with pressurized pin 16, can make pressurized pin 16 follow the moving of freezing interface of motlten metal 12 on one side and continue reliably to be pressed into and solidify the finish time, Yi Bian be pressed into the position of abundant crushing shrinkage cavity reliably.
Herein, if the wall thickness of the lug boss 1B of pressurized is set in 20mm, solidifying at the latest, the concluding time of solidifying of portion is 3.8 seconds (with reference to Fig. 3).Thereby the freezing interface translational speed is derived as 2.63mm/s from 10mm/3.8s, by being pressed into pressurized pin 16 with this as upper limit press-in speed V, can reliably pressurized pin 16 be pressed into the position of abundant crushing shrinkage cavity.In addition, in Fig. 4,, and have and to obtain proportion 2.73g/cm even, in the X ray evaluation, also do not find defective in the extraneous part of thick solid line
3Above high-quality condition, if but the average press-in speed V of pressurized pin 16 surpasses 2.63mm/s, then too fast with respect to the press-in speed of freezing interface translational speed pressurized pin 16, there is before shrinkage cavity takes place pressurized pin 16 just to be pressed into the misgivings of stroke end.Therefore, in order in batch process, stably to obtain high-quality, preferably avoid this condition as far as possible.
In addition, if press-in speed V solidifies progress below 1.2mm/s, resistance of pressing in is excessive, and the misgivings that pressurized pin 16 can not be pressed into enough degree of depth are arranged.Therefore, in order in batch process, stably to obtain high-quality, preferably also avoid this condition as far as possible.In addition, if the compression distance of pressurized pin 16 is shallow excessively, then because the inadequate tendency of crushing method of shrinkage cavity is arranged, so control the press-in speed of local loaded pins 16, guarantee enough compression distances, this operates in and makes disappearance aspect, solidification shrinkage space (becoming shrinkage cavity) reliably is important necessary condition.
So,, have following action effect according to the present embodiment of above explanation.
According to present embodiment, by utilizing pressurized pin 16 to add to be pressed in the position that is easy to generate casting flaw (shrinkage cavity) in the process of setting because of solidification shrinkage, i.e. the lug boss 1B of compressor housing 1, the motlten metal 12 of filling in can die-cast metal mould 11.
At this moment, follow based on the moving of freezing interface that the freezing interface translational speed by precalculated described motlten metal obtains by making pressurized pin 16, continue to be pressed into and solidify the finish time, so can regularly as one man be pressed into pressurized pin 16 with solidifying of motlten metal 12.Thereby, can solidification shrinkage space (becoming shrinkage cavity) be disappeared at the position that is easy to generate shrinkage cavity, suppress the generation of shrinkage cavity.
Therefore, can eliminate the generation of the shrinkage cavity of following solidification shrinkage, or it is reduced to denier, make the sound housing 1 of no shrinkage cavity defect.In addition, thus, the yield rate in the time of can increasing substantially die casting is with the high-quality housing 1 of low-cost manufacturing.Especially, many on the lug boss 1B of the heavy wall that is easy to generate shrinkage cavity as in the compressor housing 1 of pressure vessel, machining screwed hole or through hole after casting.Therefore, even the outside is clean, if there is shrinkage cavity in inside, then it exposes in the cutting face, become the main cause that refrigerant gas leaks, but owing to by eliminating the generation of shrinkage cavity as mentioned above or it being reduced to denier, so can access the high housing of air-tightness that cold-producing medium leaks does not take place.
In addition, owing to count the pressurization that after 0.4～1.4 second, begins to utilize pressurized pin 16 during from the end-of-fill of motlten metal, continue reliably to be pressed into to solidify the finish time so can make pressurized pin 16 follow moving of freezing interface.Therefore, utilizing the pressurization of pressurized pin 16 to begin can be not too early, pressurized pin 16 can be pressed into the stroke end, pressurized pin 16 can be continued to be pressed into and solidify the finish time.In addition, can not pressurize yet began late, the compression distance of pressurized pin 16 is shallow, the phenomenon of the shrinkage cavity defect of can not fully crushing, can eliminate the generation of shrinkage cavity reliably, or it is reduced to denier.
In addition, because the average press-in speed V of pressurized pin 16 is set at 1.2mm/s＜V＜2.63mm/s, continue reliably to be pressed into so can make pressurized pin 16 follow the moving of freezing interface of motlten metal 12 and solidify the finish time, and can be pressed into the position of abundant crushing shrinkage cavity reliably.Thereby, can make pressurized pin 16 follow the freezing interface movably, with suitable speed, and with being pressed into enough degree of depth several seconds.Therefore, solidification shrinkage space (becoming shrinkage cavity) is disappeared, can realize reliable elimination or reduction that shrinkage cavity takes place.
In addition, when pressurized is easy to generate the position of casting flaw (shrinkage cavity), because overflow part 11B is set, utilize pressurized pin 16 this overflow part of pressurization 11B, so can prevent that the product in die casting from being the pressurization vestige that housing 1 side generation pressurized forms on metal pattern 11.Thereby, can eliminate the restriction at the position of pressurized, can make and not have vestige, the higher-quality die-cast product of pressurization.
In addition, in the above-described embodiment, illustrated by utilizing the local pressurizing device 10 that air cylinder 14 is pressed into the formation of pressurized pin 16 that adds of oil pressure, but local pressurizing device 10, also be not limited to hydraulic type so, also can be to adopt the electrical servo motor, by the ball screw axle its rotation be driven and be transformed to rectilinear motion, be pressed into the DYN dynamic local pressurizing device of pressurized pin 16.
In addition, as aluminum die-cast product, illustration the housing 1 of compressor, but also be not limited to this, also can be used for all aluminum die-cast products such as cylinder, crankcase or speed changer case of aluminium alloy system.
Claims (7)
1. the manufacture method of an aluminum die-cast product, it is by utilizing the pressurized pin, and pressurization is filled into motlten metal in the metal pattern is easy to generate casting flaw because of solidification shrinkage in process of setting position pressurization die casting, it is characterized in that,
The moving of freezing interface that described pressurized pin is obtained based on the freezing interface translational speed by precalculated described motlten metal followed, and described pressurized pin continued to be pressed into solidifies the finish time.
2. the manufacture method of aluminum die-cast product as claimed in claim 1 is characterized in that, counts the pressurization that began to utilize described pressurized pin after 0.4～1.4 second during from the end-of-fill of described motlten metal.
3. the manufacture method of aluminum die-cast product as claimed in claim 1 is characterized in that, the average press-in speed V of described pressurized pin is set at 1.2mm/s＜V＜2.63mm/s.
4. the manufacture method of aluminum die-cast product as claimed in claim 1 is characterized in that, described aluminum die-cast product is a pressure vessel.
5. the manufacture method of aluminum die-cast product as claimed in claim 4 is characterized in that, described pressure vessel is the housing of compressor.
6. the manufacturing installation of an aluminum die-cast product, it is by utilizing the pressurized pin, and pressurization is filled into motlten metal in the metal pattern is easy to generate casting flaw because of solidification shrinkage in process of setting position pressurization die casting, it is characterized in that possessing:
The pressurized pin, it is provided with this position of pressurized corresponding to the position that is easy to generate described casting flaw;
Pressing mechanism, it is used for being pressed into towards described position described pressurized pin;
Control all, it controls described pressing mechanism, the moving of freezing interface that described pressurized pin is obtained based on the freezing interface translational speed by precalculated described motlten metal followed, and described pressurized pin continued to be pressed into solidifies the finish time.
7. the manufacturing installation of aluminum die-cast product as claimed in claim 6 is characterized in that,
Corresponding to the position that is easy to generate described casting flaw overflow part is set on described metal pattern, on described overflow part, can sets up described pressurized pin with being pressed into,
Utilize the described overflow part of described pressurized pin pressurized.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2006236216 | 2006-08-31 | ||
| JP2006236216A JP2008055473A (en) | 2006-08-31 | 2006-08-31 | Method and apparatus for manufacturing aluminum die-cast product |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101134235A true CN101134235A (en) | 2008-03-05 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNA2007100047811A Pending CN101134235A (en) | 2006-08-31 | 2007-01-30 | Method and apparatus for manufacturing aluminum die-cast product |
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| Country | Link |
|---|---|
| US (1) | US20080053637A1 (en) |
| JP (1) | JP2008055473A (en) |
| CN (1) | CN101134235A (en) |
| CA (1) | CA2599108A1 (en) |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102742471A (en) * | 2011-04-20 | 2012-10-24 | 常熟市辛庄镇杨园春旺机械配件厂 | Film rolling device |
| CN103470505A (en) * | 2013-09-30 | 2013-12-25 | 柳州易舟汽车空调有限公司 | Machine case of compressor |
| CN104014760A (en) * | 2014-03-10 | 2014-09-03 | 宁波市俊博机械有限公司 | Die-casting die capable of preventing shrinkage cavity of casting and die-casting technique thereof |
| CN106041021A (en) * | 2016-07-11 | 2016-10-26 | 肇庆高新区鸿胜模具制造有限公司 | Local pressurizing structure of high-air-sealed die-casting die |
| CN109909476A (en) * | 2017-11-24 | 2019-06-21 | 东洋机械金属株式会社 | Extrusion pin control device and die casting machine having the same |
| CN110039258A (en) * | 2019-04-22 | 2019-07-23 | 武义西林德机械制造有限公司 | A kind of manufacturing method of pressure vessel |
| CN110039257A (en) * | 2019-04-22 | 2019-07-23 | 武义西林德机械制造有限公司 | A kind of manufacturing method of safe pressure container |
| CN114042867A (en) * | 2021-11-26 | 2022-02-15 | 山西柴油机工业有限责任公司 | Local pressurizing process for casting box body |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2940158B1 (en) * | 2008-12-19 | 2012-10-12 | Peugeot Citroen Automobiles Sa | METHOD AND SYSTEM FOR MOLDING A FOUNDRY METAL PIECE |
| CN102615269B (en) * | 2011-02-01 | 2015-08-19 | 昶联金属材料应用制品(广州)有限公司 | Manufacture the method and the device that comprise the housing of plurality of metal |
| DE102013214534B4 (en) * | 2013-07-25 | 2021-07-01 | Bayerische Motoren Werke Aktiengesellschaft | Casting device and casting process |
| CN103949604B (en) * | 2014-05-12 | 2016-07-06 | 东莞市闻誉实业有限公司 | Pure Aluminum Die Casting Method |
| JP2016203197A (en) * | 2015-04-20 | 2016-12-08 | 美濃工業栃木株式会社 | Pressure application pin control method and pressure application pin control device |
| JP6455840B2 (en) * | 2015-09-07 | 2019-01-23 | 株式会社アルテックス | Squeeze pin operation determination device and squeeze pin operation determination method |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1980001658A1 (en) * | 1979-02-14 | 1980-08-21 | Nippon Denso Co | Die casting method |
-
2006
- 2006-08-31 JP JP2006236216A patent/JP2008055473A/en active Pending
-
2007
- 2007-01-30 CN CNA2007100047811A patent/CN101134235A/en active Pending
- 2007-02-22 US US11/709,208 patent/US20080053637A1/en not_active Abandoned
- 2007-08-28 CA CA002599108A patent/CA2599108A1/en not_active Abandoned
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102742471A (en) * | 2011-04-20 | 2012-10-24 | 常熟市辛庄镇杨园春旺机械配件厂 | Film rolling device |
| CN103470505A (en) * | 2013-09-30 | 2013-12-25 | 柳州易舟汽车空调有限公司 | Machine case of compressor |
| CN104014760A (en) * | 2014-03-10 | 2014-09-03 | 宁波市俊博机械有限公司 | Die-casting die capable of preventing shrinkage cavity of casting and die-casting technique thereof |
| CN104014760B (en) * | 2014-03-10 | 2017-03-01 | 宁波市俊博机械有限公司 | A kind of die casting that can prevent foundry goods shrinkage cavity and its extrusion process |
| CN106041021A (en) * | 2016-07-11 | 2016-10-26 | 肇庆高新区鸿胜模具制造有限公司 | Local pressurizing structure of high-air-sealed die-casting die |
| CN106041021B (en) * | 2016-07-11 | 2017-12-29 | 肇庆高新区鸿胜模具制造有限公司 | A kind of pressurized structure of high-air-tightness die casting |
| CN109909476A (en) * | 2017-11-24 | 2019-06-21 | 东洋机械金属株式会社 | Extrusion pin control device and die casting machine having the same |
| CN109909476B (en) * | 2017-11-24 | 2021-07-06 | 东洋机械金属株式会社 | Extrusion pin control device and die casting machine having the same |
| CN110039258A (en) * | 2019-04-22 | 2019-07-23 | 武义西林德机械制造有限公司 | A kind of manufacturing method of pressure vessel |
| CN110039257A (en) * | 2019-04-22 | 2019-07-23 | 武义西林德机械制造有限公司 | A kind of manufacturing method of safe pressure container |
| CN114042867A (en) * | 2021-11-26 | 2022-02-15 | 山西柴油机工业有限责任公司 | Local pressurizing process for casting box body |
Also Published As
| Publication number | Publication date |
|---|---|
| US20080053637A1 (en) | 2008-03-06 |
| CA2599108A1 (en) | 2008-02-29 |
| JP2008055473A (en) | 2008-03-13 |
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